Surveyor&#39;s slate and book holder.



No. 733,415. PATENTED JULY 14, 1903. E. MOGONNELL.

SURVBYORS SLATE AND BOOK HOLDER.

APPLICATION FILED JUNE 14, 1902.

N0 MODEL.

WJTNESSES.- [Nl/ENTOR vv: oma vargas m. mommmo, wnsnlnunm n. c.

NrTnD STATES Patented July 14, e.

PATENT OFFICE.

SURVEYORS SLATE AND BOOK HOLDER.

SPIFICAT-IN forming part of Letters Fatent Ivo'. {733,415, dated July 14, 1903.

Application filed June 14, 1902.

To all whom, t may concern: I

Be it known that I, EDWARD'MCCONNELL, of Richmond, in the county ofHenrico and State of Virginia, have invented certain new and usefulImprovements in Surveyors Slate and Book Holders; and I hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, which form part ofthis specification.

This invention is a novel combined slateholder and book-supportparticularly designed for the use of surveyors and engineers infieldwork when establishing slope-stakes for railways, highways, andother engineering projects where cuts and fills have to be made; and itconsists in the novel construction hereinafter described and claimed,reference being had to the accompanying drawings, in which Figure l is aperspective view of the device. Fig. 2 is a longitudinal section thereofon line 2 2, Fig. l.

The device comprises a three-sided or J- shaped frame A, preferablyformed of metal and U-shaped or channeled in cross-section, so that theslates, plates, or sheets B, of slate, Celluloid, or other suitablematerial, can be readily slipped laterally into or removed from theframe at Will. From the vertical side of frame A extends a book-supportD, which is preferably made of tubular metal for purposes of lightnessand strength. This support is sufficiently long and broad to accommodatean ordinary surveyors or engineers record-book E (such as commonly usedin recording the cross-sections and other notes in estimating cuts andfills) when opened, and the support is provided with suitablespring-clasps, such as shown at F F, to hold the book open thereon. Thelower limbs of springs F F may extend back beneath the support and beattached to the side bar of frame A, as shown in Fig. 2. The frame andsupport both lie in the same plane, and the vertical bar of the frame iscommon to both.

The slates B are ruled by ne vertical lines b and horizontalintersecting lines a, like the cross-section or drafting paperordinarily employed in drafting by engineers, architects, and others,the distances between the lines bearing some definite metricalproportion.

Serial No. 111,722; (No model.)

On these ruled slates ar'e marked heavier lines C, indicating the Widthand side pitches or slopes for cuts and fills or embankments in railwayconstruction. The indicating-lines C will vary in accordance with thewidth of cuts, (single or double track,) and I propose to provide anumber of slates made of suitable material that will take the mark of apencil, which can be nested one upon the other and can be carried in thesame frame A. The engineer or surveyor can slip any slate on top of theothers at will, and by making a selection of slates, such as will bemost useful to him after plotting on one slate, he

can place it at bottom and bring another unused slate into position foruse.

With this device the surveyor or engineer can readily plot the groundslopes and depth of cuts or embankments upon the slates and at the sametime record the memoranda thereof and calculations therefor in the book,both being conveniently at hand, thereby greatly facilitating the workand lessening labor and time ordinarily required for this Work asheretofore performed. I

The parts of the frame A and support D are preferably made 'of lightnon-corrosive metal, such as used in transits and other surveyorsinstruments.

The said device is to be used in connection with a graduated levelingrodand ten-foot leveling-bar to obtain the rise and fall of the ground atvarious angles to an established line or lines.

Having thus described my invention, what I therefore claim as new, anddesire to secure by Letters Patent thereon, is

l. The herein-described device, comprising a frame adapted to support abook, parallel pieces extending from one end of said frame and in thesame plane therewith, said pieces being longitudinally grooved ou theirinner faces, and a series of removable superposed slates interposedbetween said pieces and engaging the grooves therein, for the purposesubstantially as described.

2. In combination, a rectangular frame adapted to support a book, oneend piece of said frame being elongated beyond the sides thereof, alaterally-extending piece attached to each extremity of said end pieceand lying in the plane of the frame, said pieces being IOO -pieces andconfined in the grooves thereof,

longitudinally grooved on their inner faces; and a removable slatefitted between said substantially as and for the purpose described.

3. The herein-described device, comprising a frame adapted to support abook, springclasps for confining the book thereon, parall lel piecesextending from one side of said l frame and in the saine planetherewith, said I pieces being longitudinally grooved on their l

